from drf_haystack.serializers import HaystackSerializerfrom rest_framework import serializersfrom goods.search_indexes import SKUIndexfrom .models import SKUclass SKUSerializer(serializers.ModelSerializer):    """商品列表的序列化器:输出"""    class Meta:        model = SKU        fields = ['id', 'name', 'price', 'default_image_url', 'comments']class SKUIndexSerializer(HaystackSerializer):    """    SKU索引结果数据序列化器    """    object = SKUSerializer(read_only=True)    class Meta:        index_classes = [SKUIndex]        fields = ('text', 'object')